Part 2: Training


DMRI is an in-vivo MRI technique that measures the motion of water molecules. The technique can be used to study the connectivity of brain regions and distribution of neuro-pathways. The pathways can be represented using a technique called DMRI tractography, each tract representing water molecules in motion along the main direction.

tesla for DTI measure 'DMRI tractography'

Anatomical Regions

In biomedicine, different anatomical region are named. Today, we will study five of them:

These structures are displayed below.You can rotate the model by holding down the left mouse button and dragging. You can also zoom in and out using the mouse wheel (or the middle button). Please try it now.
The five part are displayed in different colors and the name of each part is labelled using the same colored labels in the visualization and below. The Corpus callosum or CC is the only bundle that connects the left and right brain hemispheres. In the picture, Cingulu or CG is the green bundle sitting right on top of Corpus Callosum. It is also very thin. The Cortocospinal tract or CST has a fan shape. The last two fiber bundles of IFO and ILF. It is easy to confuse these two, because they originate from the same anatomical regions. ILF goes all the way from anterior to posterior, while IFO turns to the lateral direction. Also note that this person is normal but one side of the IFO is missing (perhaps due to the low-resolution image sampling). All tasks that you will be performing will be related to these five bundles only.

Please try to learn the spatial structure as much as you can. Once you are done, please click to begin the formal task.